Precisionizer for index-pins.



No. 766,792. PATENTED AUG. 2, 1904.

' F. H. RICHARDS.

PRECISIONIZER POR INDEX PINS.

APPLIOATION FILED 00T. 2. 1903.

AHM N No. 766,792. y Patenten August a, 1904.

UNITED STATES PATENT OEEIcE.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE STANLEY RULE 8c LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PIECISIONIZER FOR IN DEX-PINS SPECIFICATION forming part of Letters Patent No. 766,792, dated August 2, 1904.

Application filed October 2,1903, Serial No. 175,422. (No model.) i

To all whom it may concern: means to move the bolt a slight amount to one Be it known that I, FRANCIS H. RICHARDS, a side or the other to preeisionize the working 50 citizen of the United States, residing at Hartpoint of the elements carried by the beam relford, in the county of Hartford and State of atively to the positioning-faces of the frame.

Connecticut, have invented certain new and In the construction and iinishing of the useful Improvements in Precisionizers for beam-arm and in thelocation of the pin-socket, Index-Pins, of which the followingis a specithe pivot-hole, and holes to carry the Work- 55 fication. ing elements error may arise, and even if no This invention relates to and has for an obactual error occurs the unavoidable variations 1o ject to provide means to precisionize a lockwhich occur in the construction of the frame ing or indeX pin. may be such that they will be cumulative with In many mechanical devices or machines the similarly unavoidable variations of the 6o some of the working parts will be carried by beam, and consequently error will be present a beam-arm or swiveled frame which will be and render the operations of the machine insupportedby another portion of the machine accurate, and at times in the making of the and by which latter portion the position of various sockets and holes on the beam sufthe Work will be controlled While being acted cient error may creep in to require the pre- 65 upon by the Working parts. The accuracy of cisionizing of the toolcontrolling portion the Work performed under such conditions relative to the work-controlling portion. The

zo depends in a large measure upon the accuracy bolt may be mounted in a socket inthe beamor precision with which the arm is halted at arm and have means for turning it eccentricthe WorkingI position relatively to the posially to such socket, so that it may be given a 7o .tioning element. In some devices a beamcertain amount of angular movement about arm will be carried by a frame. The frame the axis or center of such socket. The bolt in its process of manufacture will be planed may be mounted in an eccentric bushing in a or milled upon several of its faces, and dursocket of the beam and the bushing be proing which milling or planing there may arise vided With engaging faces, whereby it may 75 some error or an accumulation of errors, and be slightly turned within its socket and there if the Working parts are carried or controlled securely held, which turning will precision- ,30 in their work by abeampivoted to such frame ize the bolt or will rather impart an angular the beam will generally be provided with a advance to the bolt from its normal position, pin or bolt organized to coperate with suitwhich when it sinks into one of the recesses 8o ably-formed recesses in the frame, such reprovided for it will precisionize the arm. cessesor sockets, which may be in the form One of the uses to which this invention may of bolt-holes and will generally be positioned be'applied is that of a miter-box, wherein a by a jig, having faces to bear upon some of frame is provided having a back and bottom the 'plane faces of the frame. The errors to accurately position the Work and a beam- S 5 which have crept into the frame in its con arm swiveled to such frame and carrying sawstruction will be communicated through the guides, whereby the line of the cut of the saw jig to the location of the bolt-holes or indexmay be shifted to any desired angle. A sepin notches or recesses for controlling the pories of bolt-holes will be provided for the positioning of the operating parts carried by the sitions at which in actual practice the saw will 9o arm, and such parts consequently Willnotpergenerally be halted and the arm provided form their Work at the exact point they would with an index pin or bolt which will engage if the bolt-holes or recesses had been accuwith suoli notches or bolt-holes and lock the rately located. To compensate for such inarm at its adjusted positions. In organizaaccuracy and to precisionize the parts carried tions employing an index-pin acting as such by the arm, the present invention provides and not serving any of the functions of a bolt or lock and which is not active to precisionize the parts other than to point to a scale the pin may be controlled or adjusted in a similar manner. A rlhe index-scale may be carried by the main portion of the machine or by a part movably carried thereby'and the other part be 'provided with a socket and carry the index, which will be eccentrically disposed inthe socket and so located that it may be turned on an are concentric with the socket to move the index or the socket into a precisionized position relative to the scale when the index mates therewith.

In the drawings accompanying and forming part of this specification, Figure 1 is a plan view of a form of miter-box provided with the present improvement. Fig. 2 is a front view thereof, partly broken away. Fig. 3 is a side View, partly in central cross-section and on an enlarged scale. Fig. 4 shows a side View of the index-pin or locking-bolt and eccentric bushing. Fig. 4u shows a front view thereof, and Fig. 5 is a horizontal section through the same and its surrounding parts.

The frame shown herein for the purpose of illustration comprises a base portion or bottom plate 6, supported by feet7 and havingaback 8 rising' `from the base, through which back a saw-opening9 is shown, having beveled edges 10. A beam-arm 11 is pivoted to the under side of the bottom plate 6 and carries at each end a saw-guide 12, each of the saw-guides in the present instance having a base portion or block 13 entering sockets 14 upon the beam. Two of such sockets are shown for the front guide and between which it is exchangeable. At the front part of the base of the machine `is shown an apron 15, projecting therefrom and provided with a series of bolt-holes or index-pin notches 16, which will indicate the various positions at which miters or bevels are generally made upon work ordinarily in practice and will in cooperation with a bolt or pin l'ocatethe guides at the proper positions. The front of the apron is provided with a segmental guide-face 17, upon which a lip 18 of a block 19 may travel, and which block is fastened by a screw 20 to the arm and serves to assist in sustaining the beam and removing part of the strain from its pivot.

An index-pin or bolt 21 is provided for entrance into the notches or recesses 16 and is shown as carried by a body portion 22, mounted in and having a close working fit in a bushing 23, the bore 24 of which bushing is eccentric to its perimeter 25. The bolt has a reduced stem 26 projecting out of the bushing, a reduced portion 27 upon the inside of the bushing guiding the stem and forming a support for a spring 28, interposed between such reduced portion and the body portion of the bolt. The perimeter 25 of the bushing has a working' fit with Vthe socket 29 in the beam. The sides of the bushing are cut away at 30, leaving a rib 31 between such cut-away portions forming a bearing for suitable set-screws 32, which may have reduced ends 33, provided with rounding faces 34 at their ends of engagement with the rib 31. The bolt may have a recess 35 in its reduced end to receive the end 36 of an actuating-lever 37, pivoted to a bracket 38 upon the beam, wherebythe bolt may be withdrawn from its work.

Vhen it is desired to precisionize the beamarm relatively to the bolt-notches, it will simply be necessary to loosen one of the screws 32 andtighten the other, whereby the bushing is turned in its socket and the bolt or index-pin given a certain amount of angular movement laterally of its normal position, (see dotted lines, Fig. 5,) whereby errors in the construction of the parts of the device may be compensated for. In assembling the screws 32 entering the recesses in the bushing will bring it to its proper longitudinal position and hold it there while the bushing is being brought by the same screws to proper angular position. Generally in the manufacture of the miter-box the bolt-holes will be controlled as to position by a jig, so that if the faces for positioning the jig are at all erroneous all the bolt-holes will have the same amount of error, which can be compensated for by a change ofposition of the bolt. The change of this one part will control and precisionize the position of the beam relatively to the bolt-holes irrespective of the L number of such holes. The precisionizing of the beam will preeisionize the saw-guides carried thereby, so that the cut of the saw will be at the exact angle from the work-position- IOO ing portions of the frame when the index-pin The pin herein is illustrated as mounted in an eccentric bore of a bushing; but it will be apparent that the index-pin in some structures may be eccentrically disposed on its body portion, which may afford bearing-faces for the adjusting members.

The structural element herein referred to as an index-pin or bolt may of course have a different form from that illustrated, as may also most of the other parts of the device.

The truss-frame herein shown is claimed in my copending application, Serial No. 175,425, filed October 2, 1903.

Having described my invention, I claim- 1. The combination with a frame having work-positioning members and aI beam carrying tool-guides swiveled thereto, of a series of index-recesses in the frame; a socket in the beam; an eccentric bushing mounted vin said socket and having a working iit therewith; a pin carried within the bushing; and means to rotate the bushing upon its center to change IIO the position -oi the index-pin and secure the iframe, of a beam-arm swiveled thereto, saw--l guides carried by the beam-arm; bolt-recesses in the frame; a socket in the beam-arm; a bushing' mounted in andlhaving' a working' iit with the socket and having' its internal bore eccentric to its perimeter; a bolt for said recesses in and having a working' iit with the internal bore o said bushing; and means to rotate the bushing' within its socket to move the bolt and to secure the bushing in its rotated position.

3. The combination with a Jframe having work-positioning' members, of a beam swiveled thereto; tool-guides carried by the beam; a series of index-pin holes in the frame; an eccentric bushing; an index-pin carried by the bushing; and a pair of set-screws engaging the bushing from opposite sides to rotate the bushing upon its center and chang'e the position of the pin.

4L. In a ruiter-box the combination with a frame, of a beam-arm swiveled thereto; sawg'uides carried by the beam-arm; a series of bolt-recesses on the frame; a socket `in the beam-arm; a bushing' mounted in and having' a working iit with the socket and having' its internal bore eccentric to its perimeter; a bolt having a working fit with said internal bore; and -means to turn the bushing' within its socketand to lock the same against rotation.V

5. .The combination with a frame having' work-positioningmembers, of a beam swiveled thereto; tool-guides carried by the beam; a series of index-pin holes in the frame; a socket 'in the beam; a bushing having' an eccentric bore carried by said socket; an indexpin mounted in said bore; a pair of recesses on one side of the bushing extending inwardlyA from opposite sides and leaving a rib therebetween; a screw-threaded hole in each side of the beam transverselydisposed to the socket and both entering the socket at one side and on a line with the recesses in the bushing; and set-screws in said holes organized to enterthe recesses and bear upon the rib.

6. The combination with a frame having' work-positioning' members, of a beam swiveled thereto; tool-guides carried by the beam; index-recesses on the frame; a socket in the beam; a bushing' having' an eccentric bore carried'l by said socket; an index mounted i'n said bore; a pair of recesses on one side of the bushing projecting' inwardly from opposite sides and leaving' a rib therebetween; a screwthreaded hole in each side of the beam transversely disposed to the socket and both enter ing' the socket at one side and on a line with the recesses in the bushing; and set-screws in said holes organized to enter the recesses and bear upon the rib.

7. In a imiter-box the combination with a frame, oi' a part movably connected thereto; saw-guides carried thereby; an index-scale on one of' them; a socket in one of them; a bushing having an eccentric bore mounted in the socket; an index in said bore; oppositely-disposed tangential recesses in one side of the bushing with a rib therebetween; screwthreaded holes leading' into one side of the socket at the reg'ion of the recesses in the bushing' when the part-s are assembled; pins having screws to mate with the threaded holes to fit the recesses and locate the bushing' longitudinally and to bear on the rib and locate the same angularly.

8. The combination with a frame having' work-positioning' members and a beam carrying tool-guides swiveled thereto, oi' a series of index-recesses in the frame; an eccentric bushing; an index-pin carried by the bushing; and screws eng'aging' the bushing from opposite sides to rotate the same upon its center and change the position of the index.

9. In a miter-box the combinationwith a frame having' work-positioning portions and a tool-guide-carrying beam swivelcd thereto, of a series of index-notches inthe frame; an eccentric bushing; an index carried by the bushing; and screws active uponopposite sides of the bushing to rotate the same upon its center and change the position oi' the index.

10. The combination with aframe,oi`a beamarm swiveled thereto; saw-guides carried by the beam-arm; a series of indexnotches on the frame; a socket in the beam; a bushing mounted in and having' a working` it with the socket and having' an internal bore eccentric to its perimeter; an index having' a working' t with said internal bore; and means embodying a screw to turn the bushing' within its socket and to lock the same against rotation.

Signed this 19th day of September, 1903, at Nos. 9 to 15 Murray street, New York, N. Y.

FRANCIS H. RICHARDS.

Vitnesses:

CHAs. LYON RUSSELL, FRED. J. DOLE.

ICO 

